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本文主要介绍采用低本底全身计数器,测定北京、河南郑州和安徽潜山三个地区的368名成年人(男性266人,年龄17—62岁,女性102人,年龄20—59岁)体内~(40)K、~(137)Cs、~(226)Ra 的γ放射性水平。测定结果表明,体内的 K 浓度 C(g/kg)与年龄 A(岁)和性别间有依赖关系,对成年男、女的回归方程分别为:C_男=2.62-0.0144A 和 C_女=1.77-0.0042A;成年男、女平均 K 浓度±标准差分别为2.18±0.21(g/kg)和1.60±0.06(g/kg)。体内~(137)Cs 的含量,男性为39—65Bq,女性为52—56Bq,但与年龄和性别无明显的依赖关系。体内~(226)Ra 的含量,在被测的368名中仅有68人大于装置的最低可测限(46Bq),含量在58—74Bq 范围内。
This article describes the use of low background total body counter, measuring 368 adults (266 males, aged 17-62 years, 102 females, aged 20-59 years old) in Beijing, Zhengzhou and Anhui Buried Hill three regions ~ (40) K, ~ (137) Cs, ~ (226) Ra. The results showed that the regression equation between male K and male K was C (g / kg) was related to age A (age) and sex, respectively. The regression equations of male K and male C were male = 2.62-0.0144A and female = 1.77-0.0042A. The average K concentrations in males and females were 2.18 ± 0.21 (g / kg) and 1.60 ± 0.06 (g / kg), respectively. The content of 137Cs in the body is 39-65Bq in males and 52-56Bq in females, but there is no obvious dependence on age and sex. The content of ~ (226) Ra in the body, only 68 of the 368 tested were greater than the lowest measurable limit (46Bq) of the device and the content was in the range of 58-74Bq.